Journal
IEEE SOLID-STATE CIRCUITS LETTERS
Volume 3, Issue -, Pages 82-85Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LSSC.2020.3005784
Keywords
Duty-cycling; dynamic; Internet-of-Things (IoT); low power; power gating; resistive bridge; SAR ADC; temperature sensor
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This letter describes a miniature, ultra low power, all-dynamic temperature sensor based on a duty-cycled resistive transducer bridge and a 9-bit asynchronous SAR ADC in 65-nm CMOS. It features a novel floating bridge technique and automatic power gating to achieve the lowest reported power consumption. It consumes 2.18 pJ per conversion and has an RMS resolution of 0.53 K, leading to an FoM of 0.61 pJ.K-2. A standby power of 52 pW allows a high power-efficiency, even at low sample rates. It occupies 36x46 mu m of chip area and has a sensing range from -20 degrees C to 120 degrees C.
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